This topic describes available upgrade options, their prerequisites, and the overall
process. You are strongly encouraged to read completely through
this entire document before starting the upgrade process, to that you understand the
interdependencies and order of the steps. It is highly
recommended you validate these steps in a test environment to adjust and account
for any special configurations for your cluster.

The high-level process for performing an HDP upgrade is as follows:

Ambari will guide you through the steps required to upgrade HDP. Make sure Ambari and the
cluster are healthy, operating normally, and all service checks are passing.

Note

Be sure to review the available HDP upgrade scenarios below. It is strongly recommended that you first upgrade to Ambari
2.7 before upgrading HDP unless otherwise noted. After upgrading Ambari, be sure
the cluster is operating normally and service checks are passing prior to attempting an HDP
upgrade.

Ambari 2.7 does not support IOP-HDP migration. Customers migrating from IOP should use
Ambari 2.6.1 to migrate IOP to HDP 2.6.4, then upgrade Ambari to 2.7 and use it to upgrade HDP
2.6.4 to HDP 3.0.

There is only one method for upgrading HDP-2.6 to HDP-3.0 with Ambari: Express Upgrade.

An Express Upgrade orchestrates the HDP upgrade in an order
that will incur cluster downtime.